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US2858507A
Expired / Lapsed
US
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Electric testing device
Assignee: FENDAIL Co
•
Filing: 1953-12-10
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Granted: 1958-10-28
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Expires: 1973-12-10
Abstract
No abstract record available.
Inventors
- 👤 Philip J Liautaud
- 👤 Edward J Matousek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:46
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02; G01R27/16; G01R27/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1852980A
Cited
US1969713A
Cited
US2442771A
Cited
US2515623A
Cited
US2584680A
Cited
US2762014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |